Using the @ and # symbols in tweets with a word joiner character

When scrolling through Svelte tweets in my Twitter timeline, occasionally, I see tweets about the Svelte template syntax which contain strings like @const (referring to the {@const ...} tag) or #if (referring to an {#if ...} block).

Since @ and # have special meanings in tweets, Twitter interprets the string @const as a mention of Twitter user Konstantin Martynov (whose Twitter username happens to be @const). Likewise, Twitter interprets the string #if as a hashtag and links straight to a dodgier part of Twitter.

But there are tweets like this one by Geoff Rich that contain the @const string without displaying it as a mention:

How did Geoff pull this off? Copying the @const string from the original tweet and displaying its second character like so

const string = '@const';
string.charCodeAt(1);

yields 8203 corresponding to 0x200B (hexadecimal). This is the U+200B ZERO-WIDTH SPACE Unicode character. An invisible space between @ and const keeps Twitter from displaying the string as a mention.

To avoid a potential line break between @ and const, you should use the U+2060 WORD JOINER Unicode character instead. How can you insert a word joiner character into your tweet? Click the button below to copy a word joiner and paste it into your tweet draft.